78390615 ÷ 342 
We're looking to find how many times 342 goes into 78390615.

Let's proceed to step 1:
If we divide 7 by 342, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (8) from the dividend, attach it to 7 and continue: 78 / 342

Going ahead to step 2:
342 can be fit into 78 0 times, resulting in a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Take the next digit (3) from the dividend and append it to 78, then repeat: 783 / 342

Step 3:
The number 342 fits into 783 2 times, leaving a remainder of 99.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 684 away from 783, we end up with 99.
Fetch the next digit (9) from the dividend, attach it to 99 and continue: 999 / 342

Step 4:
The number 342 fits into 999 2 times, leaving a remainder of 315.
Put 2 as the next digit of the answer. 
Result so far: 22.0
The remainder is 315 after subtracting 684 from 999.
Grab the next digit (0) from the dividend, add it to 315, then carry on: 3150 / 342

Moving on to step 5:
The number 342 fits into 3150 9 times, leaving a remainder of 72.
Put 9 as the next digit of the answer. 
Result so far: 229.0
Subtracting 3078 from 3150 leaves us with 72.
Include the next digit (6) from the dividend after 72, then repeat: 726 / 342

Step 6:
726 divided by 342 is 2 with a remainder of 42.
Put 2 as the next digit of the answer. 
Result so far: 2292.0
If we subtract 684 from 726, we get 42.
Append the next digit (1) from the dividend to 42 and continue with: 421 / 342

Moving on to step 7:
The number 342 fits into 421 1 times, leaving a remainder of 79.
The number 1 becomes the next digit in our result. 
Result so far: 22921.0
Subtract 342 from 421 to get 79.
Include the next digit (5) from the dividend after 79, then repeat: 795 / 342

Step 8:
The number 342 fits into 795 2 times, leaving a remainder of 111.
Write down 2 as next digit of the result. 
Result so far: 229212.0
Deduct 684 from 795 and we're left with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Moving on to step 9:
When dividing 1110 by 342, we get 3 with a remainder of 84.
The next digit of our result is 3. 
Result so far: 229212.3
If we take 1026 away from 1110, we end up with 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

On to step 10:
If we divide 840 by 342, we get 2 and a remainder of 156.
Record the quotient 2 as the next digit in the result. 
Result so far: 229212.32
Subtracting 684 from 840 leaves us with 156.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1560, and continue the process.

Advancing to step 11:
342 goes into 1560 4 times with a remainder of 192.
Put 4 as the next digit of the answer. 
Result so far: 229212.324
If we subtract 1368 from 1560, we get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

Let's proceed to step 12:
The number 342 fits into 1920 5 times, leaving a remainder of 210.
Put 5 as the next digit of the answer. 
Result so far: 229212.3245
Deduct 1710 from 1920 and we're left with 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2100, and continue the process.

On to step 13:
342 goes into 2100 6 times with a remainder of 48.
The next digit of our result is 6. 
Result so far: 229212.32456
If we subtract 2052 from 2100, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 14:
342 goes into 480 1 times with a remainder of 138.
Record the quotient 1 as the next digit in the result. 
Result so far: 229212.324561
Deduct 342 from 480 and we're left with 138.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1380, and continue the process.

Advancing to step 15:
The number 342 fits into 1380 4 times, leaving a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 229212.3245614
If we subtract 1368 from 1380, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 16:
If we divide 120 by 342, we get 0 and a remainder of 120.
Use 0 as the next digit of our solution. 
Result so far: 229212.3245614
The remainder is 120 after subtracting 0 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1200, and continue the process.

After the division, we end up with 229212.3245614 and a remainder of 1.2e-07.